THE PYRAMIDS OF EGYPT.
These were 70 in number. They were constructed of blocks of red granite and of a very hard stone. These were of extraordinary size, and their transportation and adjustment indicates a surprising degree of mechanical skill. The Great Pyramid was supposed to have been erected about 3,800 years B. C., and is of the enormous size of 746 square feet at its base, covering about 12 acres of ground, and is over 450 feet high. It was probably erected as a burial place for the rulers of Egypt.